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Scythe Slip Stream 110 cfm question

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#1
I have being doubting the numbers that scythe advertises its slipstreams, for instance, looking for another 25mm fan that had the same amount of CFM were a delta with 3400RPM, instead of 1900.

The Sflex move 35CFM less than the Slipstream at the same RPM

Is there some sort of validity to those claims?

On another note, these are the fans i think could be the top one, not in order:

THIS looks very good!
http://www.youtube.com/user/Martinm210#p/u

Scythe "KAMA FLEX" 120 mm Silent Case Fan - High Speed
Scythe "SLIP STREAM" 120mm Case Fan" 1900 rpm
SCYTHE S-FLEX™ "G" 120mm 1900 rpm
Scythe Gentle Typhoon 120 mm by Nidec Servo Corp. - Ultra High Speed
Yate Loon 120mm High Speed
 
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#2
you have to take pitch of the blades and amount of blades into account as well, not just the RPM and CFM ratings;)
 

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#3
I use the 88cfm 1600rpm versions and the claims are indeed vaild. Excellent fans.
 
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#4
you have to take pitch of the blades and amount of blades into account as well, not just the RPM and CFM ratings;)
Cooler master R4 have 9 too, and they are at 2000RPM 69CFM
 

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#5
Pitch of the blades? count isnt everything.

INHO if the fan wasnt up to snuff it would have been discounted as such by now, and not be as popular of a buy.
 
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#6
Pitch of the blades? count isnt everything.
True but i dont think they are advertised, and since their specs are so great why there aren´t any similar fans?
 

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#7
exactly, once they are in hand you can see the difference. Same tech that goes into racing boat propellers. More pitch = more thrust.
 
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#8
but they must have a disadvantage, something like lower static pressure?
 
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#9
Being the fan lover I am.. I will be the one to say that Scythe isn't fubaring on what is being shown. Those fans can push massive air, and cool anything down. ;)



as for the reasoning on how the two can be different, Sneeky's Boat propeller reference makes the proper thoughts on development.

Look at how Rads are built.. Less spaces between rad, the lower the CFM fan you need due to not having to cool so much in so little of a area. Where as if you get a rad, with spaces galore, you'll want to get a higher cfm rated fan so it can push more air in such a small space.
 

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#10
I wouldnt say that, Noctuas dont seem to have a pressure issue.
 
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#11
Speaking of theres more to fans then RPMS and such like

read what silenx say make their fans good

http://www.silenx.com/ixtremaprofans.asp

reduced motor size/different shape motor cover etc


Little changes in design can affect the fans a great deal.

Its what makes the difference between cheap OEM and epic fans.
 
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#12
I wish i could afford getting every major manuf 120mm and equipment to test them out
 
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#13
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#14
I am placing in first post every 120mm fan I am interested in "testing"
 

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#15
Go to youtube, alot of those fans have been tested where you can see the meters and hear the fans;)
 
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#16
There was a really comprehensive test of fans at bit-tech that I read. You may find useful here.

I am using Skythe S-Flex 1600 and the Skythe Ultra Kaze and for sure these fans move insane amounts of air. So I would never question anything Skythe claim about their Slipstreams.
 
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#17
I've got one of those silenx fans you want to test, Silenx seem to have a QC problem though as a lot of people seem to get dud fans. ( judging by reviews)

All the ones I've bought have been fine though, so its hit or miss I guess : ]
 
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#18
I've got one of those silenx fans you want to test, Silenx seem to have a QC problem though as a lot of people seem to get dud fans. ( judging by reviews)

All the ones I've bought have been fine though, so its hit or miss I guess : ]
25 or 38mm and do they seem that quiet and moving that amount of air?
 
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#19
38 thick

Judge for yourself here's a video I made

http://www.youtube.com/watch?v=GmyL3SoYtag

I start from 3 foot away, I finish with the lens pretty much touching the fan.



As for airflow, no idea if its what they're rated for but they do move more air tehn any of my other fans.
 
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#20
38 thick

Judge for yourself here's a video I made

http://www.youtube.com/watch?v=GmyL3SoYtag

I start from 3 foot away, I finish with the lens pretty much touching the fan.



As for airflow, no idea if its what they're rated for but they do move more air tehn any of my other fans.
Thats should be around 20-25dB, though you shoulda have approached the fan from sideways so that the air wouldnt interfere hehe, but that was very enlightening :toast:
 
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#21
Thats should be around 20-25dB, though you shoulda have approached the fan from sideways so that the air wouldnt interfere hehe, but that was very enlightening :toast:


Yeah in hind sight I should of :laugh:
 
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#22
but they must have a disadvantage, something like lower static pressure?
SlipStreams do have pretty crappy static pressure.

S-Flexes and Gentle Typhoons have better static pressure, if I remember correctly the Typhoons have some of the best static pressure in the 25mm category.
 
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#23
Go to youtube, alot of those fans have been tested where you can see the meters and hear the fans;)

Sneeky did you ever got round to testing a batch of silenx fans?

Because I'd still really like to know the actual specs :laugh:

And I'd like to know the static pressure since silenx don't have it listed.
 
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#24
SlipStreams do have pretty crappy static pressure.

S-Flexes and Gentle Typhoons have better static pressure, if I remember correctly the Typhoons have some of the best static pressure in the 25mm category.
Yep, you'd be correct on the Typhoons. The bit-tech review seems to like them best for rads and other high-static pressure applications.
 

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#25
SlipStreams do have pretty crappy static pressure.
Care to show me the numbers? They blow a lot of air and are quiet. In either a widely spaced fin radiator or a closely spaced fin radiator a lot of air will be coming out of the other side. :)
 
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